/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
** 
** http://oss.sgi.com/projects/FreeB
** 
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
** 
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
** 
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
**
*/
/*
** Author: Eric Veach, July 1994.
**
** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
** $Header: /cvs/mesa/Mesa/src/glu/sgi/libtess/dict.c,v 1.1 2001/03/17 00:25:41 brianp Exp $
*/


#include <stdlib.h>
#include <dict.h>

namespace Tess
{


Dict::Dict(void* pFrame, leq pfnLeq) : m_pFrame(pFrame), m_pfnLeq(pfnLeq)
{
    DictNode* pHead = &m_headNode;
    pHead->m_key = NULL;
    pHead->m_pNext = pHead;
    pHead->m_pPrev = pHead;
}

Dict::~Dict()
{
    DictNode* pNode;

    for(pNode = m_headNode.get_Next(); pNode != &m_headNode; pNode = pNode->get_Next())
    {
        delete pNode;
    }
}


DictNode* Dict::InsertBefore(DictNode* pNode, DictKey key)
{
    DictNode* pNewNode;

    do
    {
        pNode = pNode->get_Prev();

    } while(pNode->get_Key() != NULL && !m_pfnLeq(m_pFrame, pNode->get_Key(), key));

    pNewNode = new DictNode();

    pNewNode->m_key = key;
    pNewNode->m_pNext = pNode->m_pNext;
    pNode->m_pNext->m_pPrev = pNewNode;
    pNewNode->m_pPrev = pNode;
    pNode->m_pNext = pNewNode;

    return pNewNode;
}


void Dict::Delete(DictNode* pNode)
{
    pNode->m_pNext->m_pPrev = pNode->m_pPrev;
    pNode->m_pPrev->m_pNext = pNode->m_pNext;

    delete pNode;
}

DictNode* Dict::Search(DictKey key)
{
    DictNode* pNode = &m_headNode;

    do
    {
        pNode = pNode->get_Next();

    } while(pNode->get_Key() != key && !m_pfnLeq(m_pFrame, key, pNode->get_Key()));

    return pNode;
}




} // namespace Tess
